Oil-tight swivel.



E. DOUBLE.

OIL, EIGHT SWIVEL.

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OIL-TIGHT SWIVEL.

Specification of Letters Patent.

Application filed July 20, 1916. Serial No. 110,266.

To all whom it may concern: 7

Be it known that I, EDWARD DOUBLE, a

,citizen of the United States, residing at Los Angeles, in the county ofLos Angeles and State of California, have invented a new and usefulOil-Tight Swivel, of which the following is a specification.

This invention relates to devices of the character designed to connect awell casing or other pipe to a hydraulic pipe line or hose and an objectof the invention is to effect this in such way that the casing can begiven a rotary motion by any well known means and leakage of water andlubricating oil cannot occur.

Another object is to so construct the swivel that the packing glands canbe readily adjusted to tighten up the packing when such tighteningbecomes desirable.

Another object is to produce a simplified swivel for hydraulic purposes.

Other objects and advantages will appear in the subjoined detaildescription.

The accompanying drawings illustrate the invention.

Figure 1 is an elevation mainly in vertical mid section of a swivelembodying the invention. Fig. 2 is a plan section on line indicated by w-w Fig. 1. There is provided a swivel stem 1 screwthreaded at its lowerend so as to be readily connected by'a coupling 2 to a, string of casingor the like, not shown. Above and engaging the upper end of the coupling2 is a am collar or nut 3 screw-threaded onto the .swivel stem to lockthe coupling 2 againstunscrewingr The swivel stem 1 is provided betweenits ends with an annular abutment or shoulder 4 resting on a collar 5which surrounds the swivel stem, there being another collar 6surrounding the swivel stem and there being antifriction bearing membersin the form of balls 7 between said collars and there being a suitablecage 8 to hold the balls 7 in spaced relation near the peripheries ofthe collars. Thus the collars 5, 6, balls .,7 and'cage 8 form anantifriction bearing. The lower collar 6 is supported by a hollow plugforming a head 9 provided with an axial bore 10 to hold a bushingllthrough which the swivel stem 1 extends. The head 9 is provided with acollar 12 which, as shown in the drawings, may be integral therewith,said collar forming a stuffing box 13 to contain packing 14 held inplace by a gland 15 that is screw-threaded into and adjustable relativeto said box so as to govern the pressure of the packing against theswivel stem which it engages to prevent leakage of oil between the stemand box. The head 9 forms one member of ahollow trunnion and isscrew-threaded into the lower end of a chambered member or jacket 16 ofthe other trunnion member in which are accommodated the shoulder 4,collars 5, 6, balls 7, ball cage 8 and lubricating oil or grease, notshown. As shown in the drawings the jacket 16 may be integral with thetrunnion head 17 provided with an axial bore 18 to accommodate theswivel stem 1, there being one or more washers 19 between the annularshoulder 4; and the head 17 to prevent upward movement of the swivelstem relative to the trunnion.

From the foregoing it is clear that the weight of the swivel stem andthe string of casing to which it may be attached is borne by the bearingballs 7 and that said weight is suspended from the trunnion. Thetrunnion head 17 is provided with pins 19' which may be integraltherewith as shown and which are journaled in the lower ends of a clevisor bail 20 so that the swivel can be readily supported byany preferredtackle, not shown, carried by a suitable derrick, not shown. Into theends of the pins 19 are screw-threaded cap screws: 21, there beingwashers 22 between the heads of said cap screws and the ends of the pinsof larger diameter thansaid pins so as to retain the bail 20 in positionon the pins.

The bore 18 of the trunnion head 17 is enlarged at its upper end to forma packing box 23 which is provided with packin 24 held in place andadjusted as required y a gland 25 screw-threaded into said box.Extending up from the head 17 between the box 23 and the pins 19 arearms 26 which may be integral with the head as shown. The arms 26connect the trunnion head 17 to a collar 27 forming a stuffing box 28containing packing 29 surrounding the swivel 1, there being a gland 30to adjustably hold said packing in place. Both of the boxes 23, 28 andtheir glands 25, 30 are accessible through the interarm spaces oropenings 31 so that the packing can be readily renewed or can betightened up when desired without it being necessary to disturb theother parts of the swivel. The upper or outer end of Patented J an. 2,1917.

the box 28 is closed by a bushing 32 which fits inside of the collar 27and surrounds the upper end of the swivel stem 1, said swivel stemhaving a turning fit in said bushing and thus being between the box andthe stem. The bushing 32 is provided with an annular flange 33 throughwhich extends stud bolts 34 fastened'in the collar 27 so as to hold thebushing 32 in place. The bushing 32 and flange may be integral, asshown, with a goose neck 35 adapted to be connected by a suitable union36 and nipple 37 to a hydraulic supply hose, not shown.

From the foregoing it is-readily seen that in practice liquid forhydraulicing is supthrough the openings 31 and that when the packing isto be renewed nothing but the glands need be disturbed.

The foregoing will enable those skilled in the art to which theinvention appertains to make and use the invention which is understoodtobe only limited to structure that iswithin the spirit and scope of theappended claims.-

I claim:

1. In combination, a trunnion, a swivel stem having a shoulder, anantifriction de-,

. vice between the shoulder and the trunnion,

a box surrounding one end of the swivel stem and connected to thetrunnion, a gland for saidbox, and a goose neck fastened directly to thebox and discharging directly into the swivel stem.

2. In combination a trunnion, a swivel stem having a shoulder, anantifriction device between the shoulder and the trunnion,

a box surrounding one end of the swivel and connected by arms to thetrunnion, and a gland for said box, said box and gland being accessiblethrough the space between said arms.

3;, In combination, a trunnion, a swivel stem having a shoulder, anantifriction device'between the shoulder and the trunnion, a boxsurrounding one end of the swivel and connected to the-trunnion, a glandto close one end of said box, a bushing between the box and swivel stem,means to hold the bush- 3 g 1n place, and a goose neck integral with thebushing.

4. In combination, a trunnion, a swivel In having a shoulder, anantifriction de vice between the shoulder and the trunnion, abox-surrounding one end of the swivel and connected by arms to thetrunnion, a gland to close one .end of the box, said box and .beingchambered, a

means located in the chamber of the upper' gland being accessiblethrough the spaces between the arms, a bushing between the box andswivel stem, means to hold the bushing in place, and a goose neck,integral-with the bushing. Y

5. In combination, a trunnion, a swivel stem having a shoulder, anantifriction device between the shoulder and the trunnion,

abox surroundingjone end of the swivel and connected by arms to thetrunnion, said trunnion forming a second box, and glands for the boxesrespectively, said boxes and glands being accessible through the spacesbetween the arms.

6. In combination, a trunnion, a swivel stem having a shoulder, anantifriction device between the shoulder and the trunnion and inclosedby the trunnion, a box connected to the trunnion, said trunnion forminga box above the level of the shoulder and another box below the level ofsaid shoulder, and glands for the boxes respectively, there being anopening between the first named box and trunnion to give accessto thegland of said first box and the gland of the upper box of the trunnion.

- 7. In combination, a trunnion comprising upper and lower membersdetachably connected to one another, the-upper member being chamberedand having an opening a sw1vel stem, means located in the cham er oftheupper trunnion member to journal the swivel stem, boxes formed in thetrunnion members respectively, and glands for I said boxes, the glandfor the upper box being accessible through said opening.

8. In combination, a trunnion comprising upper and lower membersdetachably connected to one another, the upper member being chambered, aswivel stem, means located inthechamber of the upper trunnion member tojournal the swivel stem, intermediate and lower boxes formed in theupper and lower trunnion members respectively, an upper box connected byarms to the upper trunnion member, and glands for the boxesrespectively, the glands of the uppermost box and intermediate box beingaccessible through the space between the arms.

9. In combination, a trunnion comprising upper and lower membersdetachably connected to one another the upper member ollow swivel stem,

trunnion member to journal the swivel stem, intermediate and lower boxesformed in the upper and lower trunnion members respectively, an upperbox connected by arms to the upper trunnion member, glands for the boxesrespectively, the glands of the up- I permost box and intermediate boxbeing accessible through the space between the arms, and a goose neckconnected to the upper box and discharging into the bore of the swivelstem.

10. In combination, a trunnion, a's'wi'vel stem, means to ournal theswlvel stem 1n the trunnion, a box connected with the trune, nion, ahose connection connected with the 4 box, and a gland for said boxadjustable independently of said hose connection.

11. In combination, a,trunnion,'a swivel stem, means to journalitheswivel'stem in the trunnion, a box connected with the trunnion, a hoseconnection, a second box formed in the trunnion, and lands for the boxesrespectively adjustable independentlyof said hose connection' I 12.InCOIIlblIlLlllOIl, a trunnlon having achamber and having a lateralopening, a swivel stem, means in the chamber to our- 15th day of Julynal the swivel stem, a box formed in the trunnion between the openingand chamber, and a gland for said box extending into said opening. I

13. In combination, a trunnion having a chamber and having a'lateralopening above said chamber, a swivel stem, means in the chamber tojournal the swivel stem, boxes respectively above and below the opening,

and glands for the boxes-respectively.

' Signed at 'Los Angeles, California, this EDWARD DOUBLE.

,Witnesses:

ANNA F. SOIIMIDTBAUER, L. BELLE WEAVER.

